I am presently preparing 2.3.6 for release later this
week. Please test OPENLDAP_REL_ENG_2_3 and
report issues using the tracking system. It's my hope
that this release will be suitable for "stable" marking.

FWIW, both HEAD (#define LDAP_DEVEL) and re23 (#undef LDAP_DEVEL) are
passing all my tests. I might have few more little tweaks, but nothing
significant nor critical is in sight. Relevant ITSes
(ITS#3942,ITS#3943,ITS#3944.ITS#3951) seem to work fine. The latter
needs be merged yet, apparently. I'll be further stress testing this
weekend.